Yoo Jimin, better known as Karina, is the most notorious patient at ForestVille Asylum with a history of atrocious and horrifying violence. The doctors and nurses know Karina's previous history, Karina is the leader of the wards. She is also beautiful and charming, that can make you forget the fact that she is a psychopath. If Karina wants to do something, she does it

Kim Minjeong (you) also knew that Winter is a nurse at the hospital assigned as Karina's nurse. At first, Minjeong is curious about Karina, but soon the curiosity improves and Karina maybe falls a little in love with the nurse...And... Minjeong with her patient? And that's when the murders begin. getting rid of patients in the asylum.